Yes its iychy really bad and when my doctor checked therenlast he did say ot was red and he gave me some cream to try for it but it made it sting real bad so i stopped using it
your symptoms do sound like IBS and yes if ur more stressed or anxious it can make the symptoms worse. thats what im like. bare in mind that going to the loo up to 3 times a day is within normal limits and docs actually only class it as diarrhoea if u go 6 or more times a day!
the only thing u might wanna check out is that if its itchy check it isnt a fungal infection. is it red and itchy? with IBS u usually just pass abit of mucus with the stools, it shouldnt be around ur bum when ur not passing stools.
i shouldnt imagine itd be anything else other than those 2 things though